1 /*****************************************************************************
2 * vpar_pool.c : management of the pool of decoder threads
3 *****************************************************************************
4 * Copyright (C) 1999, 2000, 2001 VideoLAN
5 * $Id: vpar_pool.c,v 1.4 2001/10/11 13:19:27 massiot Exp $
7 * Authors: Christophe Massiot <massiot@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
29 #include <string.h> /* memcpy(), memset() */
30 #include <stdlib.h> /* realloc() */
39 #include "stream_control.h"
40 #include "input_ext-dec.h"
43 #include "video_output.h"
45 #include "vdec_ext-plugins.h"
46 #include "vpar_pool.h"
47 #include "video_parser.h"
48 #include "video_decoder.h"
53 static void WaitDummy( vdec_pool_t * p_pool );
54 static void WaitPool( vdec_pool_t * p_pool );
55 static void FreeMacroblockDummy( vdec_pool_t * p_pool, macroblock_t * p_mb );
56 static void FreeMacroblockPool( vdec_pool_t * p_pool, macroblock_t * p_mb );
57 static macroblock_t * NewMacroblockDummy( vdec_pool_t * p_pool );
58 static macroblock_t * NewMacroblockPool( vdec_pool_t * p_pool );
59 static void DecodeMacroblockDummy( vdec_pool_t * p_pool, macroblock_t * p_mb );
60 static void DecodeMacroblockPool( vdec_pool_t * p_pool, macroblock_t * p_mb );
62 /*****************************************************************************
63 * vpar_InitPool: Initializes the pool structure
64 *****************************************************************************/
65 void vpar_InitPool( vpar_thread_t * p_vpar )
69 /* Initialize mutex and cond. */
70 vlc_mutex_init( &p_vpar->pool.lock );
71 vlc_cond_init( &p_vpar->pool.wait_empty );
72 vlc_cond_init( &p_vpar->pool.wait_undecoded );
74 /* Spawn optional video decoder threads. */
75 p_vpar->pool.i_smp = 0;
76 p_vpar->pool.pp_vdec = NULL;
77 p_vpar->pool.p_macroblocks = NULL;
78 p_vpar->pool.pp_empty_macroblocks = NULL;
79 p_vpar->pool.pp_new_macroblocks = NULL;
80 p_vpar->pool.p_vpar = p_vpar;
81 vpar_SpawnPool( p_vpar );
83 /* Initialize fake video decoder structure (used when
84 * decoder == parser). */
85 if ( (p_vpar->pool.p_vdec =
86 (vdec_thread_t *)malloc( sizeof(vdec_thread_t) )) == NULL )
88 intf_ErrMsg("vdec error: not enough memory for vdec_CreateThread() to create the new thread");
89 p_vpar->p_fifo->b_error = 1;
92 p_vpar->pool.p_vdec->b_die = 0;
93 p_vpar->pool.p_vdec->p_pool = &p_vpar->pool;
94 vdec_InitThread( p_vpar->pool.p_vdec );
96 for( j = 0; j < 12; j++ )
98 p_vpar->pool.mb.p_idcts[j].pi_block =
99 memalign( 16, 64 * sizeof(dctelem_t) );
103 /*****************************************************************************
104 * vpar_SpawnPool: Create and cancel video decoder threads at any time
105 *****************************************************************************
106 * This function is called on startup, and everytime the user changes the
107 * number of threads to launch. Please note that *all* decoder threads must
108 * be idle during this operation, which only happens at the end of
110 *****************************************************************************/
111 void vpar_SpawnPool( vpar_thread_t * p_vpar )
114 stream_ctrl_t * p_control;
116 p_control = p_vpar->p_config->decoder_config.p_stream_ctrl;
117 vlc_mutex_lock( &p_control->control_lock );
118 i_new_smp = p_control->i_smp;
119 vlc_mutex_unlock( &p_control->control_lock );
121 /* FIXME: No error check because I'm tired. Come back later... */
123 /* No need to lock p_vpar->pool, since decoders MUST be idle here. */
124 if( p_vpar->pool.i_smp != i_new_smp )
128 if( p_vpar->pool.i_smp > i_new_smp )
130 /* The user reduces the number of threads. */
132 for( i = p_vpar->pool.i_smp - 1; i >= i_new_smp; i-- )
136 vdec_DestroyThread( p_vpar->pool.pp_vdec[i] );
138 for( j = 0; j < 12; j++ )
140 free( p_vpar->pool.p_macroblocks[i].p_idcts[j].pi_block );
144 p_vpar->pool.pp_vdec = realloc( p_vpar->pool.pp_vdec,
145 i_new_smp * sizeof(vdec_thread_t *) );
146 p_vpar->pool.p_macroblocks = realloc( p_vpar->pool.p_macroblocks,
147 i_new_smp * sizeof(macroblock_t) );
148 p_vpar->pool.pp_empty_macroblocks = realloc( p_vpar->pool.pp_empty_macroblocks,
149 i_new_smp * sizeof(macroblock_t *) );
150 p_vpar->pool.i_index_empty = i_new_smp;
151 p_vpar->pool.pp_new_macroblocks = realloc( p_vpar->pool.pp_new_macroblocks,
152 i_new_smp * sizeof(macroblock_t *) );
153 p_vpar->pool.i_index_new = 0;
157 /* The user raises the number of threads. */
159 p_vpar->pool.pp_vdec = realloc( p_vpar->pool.pp_vdec,
160 i_new_smp * sizeof(vdec_thread_t *) );
161 p_vpar->pool.p_macroblocks = realloc( p_vpar->pool.p_macroblocks,
162 i_new_smp * sizeof(macroblock_t) );
163 p_vpar->pool.pp_empty_macroblocks = realloc( p_vpar->pool.pp_empty_macroblocks,
164 i_new_smp * sizeof(macroblock_t *) );
165 p_vpar->pool.i_index_empty = i_new_smp;
166 p_vpar->pool.pp_new_macroblocks = realloc( p_vpar->pool.pp_new_macroblocks,
167 i_new_smp * sizeof(macroblock_t *) );
168 p_vpar->pool.i_index_new = 0;
170 for( i = p_vpar->pool.i_smp; i < i_new_smp ; i++ )
174 for( j = 0; j < 12; j++ )
176 p_vpar->pool.p_macroblocks[i].p_idcts[j].pi_block =
177 memalign( 16, 64 * sizeof(dctelem_t) );
180 p_vpar->pool.pp_vdec[i] = vdec_CreateThread( &p_vpar->pool );
184 for( i = 0; i < i_new_smp; i++ )
186 p_vpar->pool.pp_empty_macroblocks[i] =
187 &p_vpar->pool.p_macroblocks[i];
189 p_vpar->pool.i_smp = i_new_smp;
194 /* We have at least one decoder thread. */
195 p_vpar->pool.pf_wait_pool = WaitPool;
196 p_vpar->pool.pf_new_mb = NewMacroblockPool;
197 p_vpar->pool.pf_free_mb = FreeMacroblockPool;
198 p_vpar->pool.pf_decode_mb = DecodeMacroblockPool;
202 /* No decoder pool. */
203 p_vpar->pool.pf_wait_pool = WaitDummy;
204 p_vpar->pool.pf_new_mb = NewMacroblockDummy;
205 p_vpar->pool.pf_free_mb = FreeMacroblockDummy;
206 p_vpar->pool.pf_decode_mb = DecodeMacroblockDummy;
210 /*****************************************************************************
211 * vpar_EndPool: Releases the pool structure
212 *****************************************************************************/
213 void vpar_EndPool( vpar_thread_t * p_vpar )
217 for( i = 0; i < p_vpar->pool.i_smp; i++ )
221 vdec_DestroyThread( p_vpar->pool.pp_vdec[i] );
223 for( j = 0; j < 12; j++ )
225 free( p_vpar->pool.p_macroblocks[i].p_idcts[j].pi_block );
229 if( p_vpar->pool.i_smp )
231 free( p_vpar->pool.pp_vdec );
232 free( p_vpar->pool.p_macroblocks );
233 free( p_vpar->pool.pp_new_macroblocks );
236 /* Free fake video decoder (used when parser == decoder). */
237 vdec_EndThread( p_vpar->pool.p_vdec );
239 /* Destroy lock and cond. */
240 vlc_mutex_destroy( &p_vpar->pool.lock );
241 vlc_cond_destroy( &p_vpar->pool.wait_empty );
242 vlc_cond_destroy( &p_vpar->pool.wait_undecoded );
245 /*****************************************************************************
246 * WaitPool: Wait until all decoders are idle
247 *****************************************************************************/
248 static void WaitPool( vdec_pool_t * p_pool )
250 vlc_mutex_lock( &p_pool->lock );
251 while( p_pool->i_index_empty != p_pool->i_smp )
253 vlc_cond_wait( &p_pool->wait_empty, &p_pool->lock );
255 vlc_mutex_unlock( &p_pool->lock );
258 /*****************************************************************************
259 * WaitDummy: Placeholder used when parser == decoder
260 *****************************************************************************/
261 static void WaitDummy( vdec_pool_t * p_pool )
265 /*****************************************************************************
266 * NewMacroblockPool: Get an empty macroblock from the decoder pool
267 *****************************************************************************/
268 static macroblock_t * NewMacroblockPool( vdec_pool_t * p_pool )
272 vlc_mutex_lock( &p_pool->lock );
273 while( p_pool->i_index_empty == 0 )
275 vlc_cond_wait( &p_pool->wait_empty, &p_pool->lock );
277 p_mb = p_pool->pp_empty_macroblocks[ --p_pool->i_index_empty ];
278 vlc_mutex_unlock( &p_pool->lock );
282 /*****************************************************************************
283 * NewMacroblockDummy: Placeholder used when parser == decoder
284 *****************************************************************************/
285 static macroblock_t * NewMacroblockDummy( vdec_pool_t * p_pool )
287 return( &p_pool->mb );
290 /*****************************************************************************
291 * FreeMacroblockPool: Free a macroblock
292 *****************************************************************************/
293 static void FreeMacroblockPool( vdec_pool_t * p_pool, macroblock_t * p_mb )
295 vlc_mutex_lock( &p_pool->lock );
296 p_pool->pp_empty_macroblocks[ p_pool->i_index_empty++ ] = p_mb;
297 vlc_cond_signal( &p_pool->wait_empty );
298 vlc_mutex_unlock( &p_pool->lock );
301 /*****************************************************************************
302 * FreeMacroblockDummy: Placeholder used when parser == decoder
303 *****************************************************************************/
304 static void FreeMacroblockDummy( vdec_pool_t * p_pool, macroblock_t * p_mb )
308 /*****************************************************************************
309 * DecodeMacroblockPool: Send a macroblock to a vdec thread
310 *****************************************************************************/
311 static void DecodeMacroblockPool( vdec_pool_t * p_pool, macroblock_t * p_mb )
313 vlc_mutex_lock( &p_pool->lock );
314 /* The undecoded macroblock LIFO cannot be full, because
315 * #macroblocks == size of the LIFO */
316 p_pool->pp_new_macroblocks[ p_pool->i_index_new++ ] = p_mb;
317 vlc_cond_signal( &p_pool->wait_undecoded );
318 vlc_mutex_unlock( &p_pool->lock );
321 /*****************************************************************************
322 * DecodeMacroblockDummy: Placeholder used when parser == decoder
323 *****************************************************************************/
324 static void DecodeMacroblockDummy( vdec_pool_t * p_pool, macroblock_t * p_mb )
326 p_pool->pf_vdec_decode( p_pool->p_vdec, p_mb );